| 148 / | HD | METAL TREATMENT |
|
| 95 | DF | PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17} |
| 559 | DF | .~ Heating or cooling of solid metal {22} |
| 579 |  | .~.~ Iron(Fe) or iron base alloy {24} |
| 580 | DF | .~.~.~> Spring or spring material |
| 581 | DF | .~.~.~> Railway stock (e.g., rails, wheels, axles, etc.) {4} |
| 586 | DF | .~.~.~> Gear |
| 587 | DF | .~.~.~> Threaded article (e.g., screws, drill bits, etc.) |
| 588 | DF | .~.~.~> Serrated work surface (e.g., saw blades, etc.) |
| 589 | DF | .~.~.~> Ring |
| 590 | DF | .~.~.~> Pipe or tube {4} |
| 595 | DF | .~.~.~> Wire, rod, or filament {4} |
| 601 | DF | .~.~.~> With coiling or treating of coiled strip {1} |
| 604 | DF | .~.~.~> Of stacked plural workpieces |
| 605 | DF | .~.~.~> Nine percent or more chromium(Cr) (e.g., Stainless steel, etc.) {4} |
| 612 | DF | .~.~.~> Starting material contains 1.7 percent or more carbon (e.g., cast iron, etc.) {4} |
| 619 | DF | .~.~.~> Containing 10 percent or more manganese(Mn) (e.g., Hadfield steel, etc.) {1} |
| 621 | DF | .~.~.~> Highly alloyed (i.e., greater than 10 percent alloying elements) |
| 622 | DF | .~.~.~> Ageing, solution treating (i.e., for hardening), precipitation hardening or strengthening {2} |
| 625 | DF | .~.~.~> Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum {8} |
| 639 | DF | .~.~.~> Localized or zone heating or cooling {5} |
| 645 | DF | .~.~.~> With flattening, straightening, or tensioning by external force |
| 646 | DF | .~.~.~> With restraining of metal from expanding or contracting during heating or cooling {1} |
| 648 | DF | .~.~.~> With working {4} |
| 655 | DF | .~.~.~> With separate handling or treating of air, water, or unspecified fluid treating media |
| 656 | DF | .~.~.~> Work handling {2} |
| 659 | DF | .~.~.~> Including spheroidizing |
| 660 | DF | .~.~.~> Including cooling (e.g., quenching, etc.) {3} |